42423444 has 36 divisors (see below), whose sum is σ = 122557344. Its totient is φ = 12120912.

The previous prime is 42423443. The next prime is 42423457. The reversal of 42423444 is 44432424.

It is a happy number.

42423444 is a `hidden beast` number, since 424 + 234 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×42423444² = 3599497201642272, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42423443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83922 + ... + 84425.

Almost surely, 2^42423444 is an apocalyptic number.

It is an amenable number.

42423444 is an abundant number, since it is smaller than the sum of its proper divisors (80133900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42423444 is a wasteful number, since it uses less digits than its factorization.

42423444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168364 (or 168359 counting only the distinct ones).

The product of its digits is 12288, while the sum is 27.

The square root of 42423444 is about 6513.3281815060. The cubic root of 42423444 is about 348.7669371664.

Adding to 42423444 its reverse (44432424), we get a palindrome (86855868).

The spelling of 42423444 in words is "forty-two million, four hundred twenty-three thousand, four hundred forty-four".